Screw base unit for a straw



FIG. 1 is a front elevational view of the screw base unit for a straw.

FIG. 2 is a rear elevational view of the screw base unit for a straw.

FIG. 3 is a side elevational view of the screw base unit for a straw.

FIG. 4 is a side elevational view of the screw base unit for a straw, opposite the side illustrated in FIG. 3.

FIG. 5 is a top plan view of the screw base unit for a straw; and,

FIG. 6 is a bottom plan view of the screw base unit for a straw. 

The ornamental design for the screw base unit for a straw, as shown and described. 